<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    ul,
    li {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .container {
      display: flex;
      width: 500px;
      height: 500px;
      background: orange;
    }

    .container .item {
      flex-shrink: 0;
      width: 120px;
      height: 120px;
    }

    .item1 {
      background-color: antiquewhite;
    }

    .item2 {
      background-color: aqua;
    }

    .item3 {
      background-color: aquamarine;
    }
  </style>
</head>

<body>
  <ul class="container">
    <li class="item item1">
      </>
    <li class="item item2">
      </>
    <li class="item item3">
      </>
    <li class="item item1">
      </>
    <li class="item item2">
      </>
  </ul>
</body>

</html>